As stated in my sig, I'm responsible if you break something. This is an educational post.
These instructions are for a 4R70W transmission on a 2002 Expedition. They may or may not be similar to other years/models.
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1. Normal maintenance requires periodic automatic transmission fluid changes. If a major repair, such as a clutch, band, bearing, etc., is required, the automatic transmission will also have to be removed for repair. At this time, the torque converter, transmission cooler and tubes must be thoroughly flushed to remove any dirt. The transmission fluid needs to be changed if evidence of fluid contamination is found. When used under continuous or severe conditions, the transmission and torque converter should be drained and refilled with fluid as specified.
2.
CAUTION: Do not use any supplemental transmission fluid additives or cleaning agents. The use of these products could cause internal transmission components to fail; this will effect the operation of the transmission.
CAUTION: Use of a fluid other than specified could result in transmission failure.
Refer to the vehicle certification label affixed to the LH front door lock face panel or door pillar for the transmission code.
These instructions are for a 4R70W transmission.
3. When filling a dry transmission and torque converter, refer to General Specifications chart in this section for capacity. Check the fluid level.
Use Mercon V automatic transmission fluid.
Removal
1. Disconnect the battery ground cable.
2. Raise and support the vehicle.
3. Place a drain pan under the transmission fluid pan.
4. Drain transmission fluid.
- Loosen the transmission fluid pan bolts and allow fluid to drain. After fluid is drained remove the bolts.
5. Remove the transmission fluid pan and transmission fluid pan gasket.
6. Pull down evenly and remove the transmission fluid filter and seal.
7. Remove torque converter housing plug.
8. Remove the torque converter drain plug and drain the torque converter.
Rotate the crankshaft to access the drain plug.
9. Clean and inspect the transmission fluid pan, gasket and magnet.
10. Flush the fluid cooler tubes. *Not sure if this can be done since you need a flushing machine for this. Basically, it pumps solvent through the cooler lines for 5 minutes, then you use compressed air to remove all the solvent.*
Installation
1.
NOTE: A new torque converter drain plug must be used.
Install the torque converter drain plug.
2. Install the torque converter housing plug.
3.
CAUTION: If installing a new filter, and the seal remains in the main control bore, carefully use a small screwdriver to remove the seal. Use care not to damage the main control bore.
NOTE: If transmission is being repaired for a contamination-related failure, use a new filter and seal. The filter may be reused if no excessive contamination is present.
Install a new fluid filter and seal as required.
4. Position the pan magnet into the transmission fluid pan.
5.
NOTE: The transmission fluid pan gasket is reusable. Clean and inspect for damage; if not damaged, the gasket should be reused.
Install the transmission fluid pan and gasket.
a. Position the transmission fluid pan and gasket.
b. Install the transmission fluid pan bolts.
6. Lower the vehicle.
7.
NOTE: When the battery is disconnected and reconnected, some abnormal drive symptoms may occur while the vehicle relearns its adaptive strategy. The vehicle may need to be driven 16 km (10 miles) or more to relearn the strategy.
Connect the battery ground cable.
8.
NOTE: When filling a dry transmission and converter, start with a minimum of 4.7 liters (5 quarts).
Fill the transmission to the correct level with clean automatic transmission fluid.
